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Tumours of the epithelial, glandular stomach lining include non-cancerous polyps and some types of chronic (hyperplastic) gastritis. Malignant epithelial tumours (gastric adenocarcinomas) cause progressive illness.
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This tumour is a disordered and purposeless overgrowth of sweat gland cells. Most sweat gland tumours are benign and can be permanently cured by total surgical removal.
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Tapeworms as their name suggests are flattened intestinal worms that are actually made up of many small segments about 3-4 mm long. Unlike roundworms which live freely in the bowel, tapeworms attach to the wall of the small intestine by hook like mouth parts.
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The testicle (testis) contains several different cell types. These include the germ cells, which make sperm, the supporting and nourishing Sertoli cells, and the hormone-producing interstitial (or Leydig) cells.
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Thiamine deficiency used to be a common condition due to the fact that in days gone by, raw fish was a common component of a dog's diet. However, commercial manufacturers realized this problem and foods were fortified with thiamine and the disease was rarely seen.
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Thyroid tumours include cystic structures called goitres, multi-nodular overgrowth (hyperplasia), benign (non-spreading) cancers (adenomas) and malignant (spreading) cancers (carcinomas).
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Since dogs have tonsils, they also have tonsillitis. It is quite common particularly in small breeds of dogs.
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The trachea (windpipe) is a flexible tube leading from the mouth to the lungs. It is supported by a collection of cartilage rings which keep the tubes open, allowing air to enter the lungs on inspiration.
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This is a common tumour, only found in dogs. It has a patchy world-wide distribution including parts of the Caribbean, USA, Southern Europe, Asia and Africa.
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Tumours of the blood cells made in the marrow are rare. There is a continuum from dysplasias (abnormal growths) to cancers (myeloproliferative disease).
